Revert "Fix broken tests take 2"

This reverts commit 2baecb5581af56d54188675043a87fc7331afe0d.
Revert "CB-5134 iOS - Add location.hash-based exec bridge."

This reverts commit 2c93179f5d7c72883bda37f559cb6ee701b5763f.
CB-5134 Add IFRAME_HASH based exec() bridge (all previous commits reverted).